GENERAL DESCRIPTION

The AD737 is a low power, precision, monolithic, true rms-to dc converter. It is laser trimmed to provide a maximum error of ±0.2 mV ± 0.3 of reading with sine wave inputs. Furthermore, it maintains high accuracy while measuring a wide range of input waveforms, including variable duty cycle pulses and triac (phase) controlled sine waves. The low cost and small physical size of this converter make it suitable for upgrading the performance of non-rms precision rectifiers in many applications. Compared to these circuits, the AD737 offers higher accuracy at equal or lower cost.

FEATURES

Computes

True rms value

Average rectified value

Absolute value

Provides

200 mV full-scale input range (larger inputs with input scaling)

Direct interfacing with 3? digit CMOS ADCs

High input impedance: 1012 ?

Low input bias current: 25 pA maximum

High accuracy: ±0.2 mV ± 0.3 of reading

RMS conversion with signal crest factors up to 5

Wide power supply range: ±2.5 V to ±16.5 V

Low power: 25 μA (typical) standby current

No external trims needed for specified accuracy

The AD737 output is negative-going; the AD736 is a positive output-going version of the same basic device

AD737KR-REEL屬于集成電路（IC） > RMS 至 DC 轉(zhuǎn)換器。亞德諾半導(dǎo)體技術(shù)有限公司制造生產(chǎn)的AD737KR-REELRMS 至 DC 轉(zhuǎn)換器RMS 至 DC 轉(zhuǎn)換器產(chǎn)品族中的產(chǎn)品可用于執(zhí)行測(cè)量時(shí)變波形的數(shù)學(xué)功能，并返回一個(gè)與等效穩(wěn)態(tài) (DC) 值成比例的值，如果將其應(yīng)用于電阻負(fù)載，則會(huì)產(chǎn)生相同的功率耗散。這些轉(zhuǎn)換器通常用于交流電源相關(guān)應(yīng)用中的測(cè)量，它們之間以及它們與用于類似終端的其他技術(shù)之間的區(qū)別在于輸入為非正弦波形時(shí)所給出結(jié)果的準(zhǔn)確性。